Created attachment 1355082 [details] TeXstudio with distorted font Description of problem: When using Qt5 applications, the font is often distorted and has a green shade (see attachment). I tested this with 3 different Qt5 apps: - vlc - TeXstudio - Mendeley I also tested Qt4 apps, like Sqliteman and Qt4 Designer, there the fonts are not affected. My graphics card is an NVIDIA GTX 960 (GM206 chip). The behavior happens both with the proprietary NVIDIA driver (from the negativo17 repository), as well as with the open source nouveau driver. A workaround is to disable subpixel rendering: ln -s /usr/share/fontconfig/conf.avail/10-no-sub-pixel.conf /etc/fonts/conf.d/ Please also pay attention to the text within the TeXstudio window in the attached screenshot: Only the currently active line that is highlighted has distorted fonts. The lines above and below look perfectly fine. Also note that VLC uses a different theme or something when using the Nouveau driver than when using the Nvidia driver. The other two tested applications however are still affected, regardless of the driver that is used. Version-Release number of selected component (if applicable): qt5-qtbase-5.9.2-4.fc27.x86_64 kernel-4.13.12-300.fc27.x86_64 dkms-nvidia-387.22-1.fc27.x86_64 nvidia-driver-libs-387.22-2.fc27.i686 nvidia-driver-libs-387.22-2.fc27.x86_64 nvidia-settings-387.22-1.fc27.x86_64 nvidia-libXNVCtrl-387.22-1.fc27.x86_64 nvidia-driver-387.22-2.fc27.x86_64 nvidia-driver-cuda-libs-387.22-2.fc27.x86_64 How reproducible: Every time Steps to Reproduce: 1. Open any Qt5 application Actual results: Distorted fonts Expected results: Not distorted fonts Additional info: The problem is reported against Fedora 27, but it also happened under Fedora 26.
For completeness, I'd encourage you to re-test with rpmfusion's freetype-freeworld package installed. Mostly to know if that makes any difference or not. Second test item: systemsettings->fonts under use-anti-aliasing -> configure -> sub-pixel rendering type: Try different options there, RGB, BGR, ... to see if that makes any difference too.
ping ^^, I'll keep this open for another week for so waiting for feedback (otherwise, since nvidia isn't anything fedora ships and without evidence this isn't an nvidia driver bug, we may have to close this CANTFIX anyway)
Hi! Sorry that it took so long. Installing the freetype-freeworld package helped, fonts are normal now. I don't know what you mean by "systemsettings", but if you mean gnome-control-center, then I could not find font settings there. If you meant gnome-tweak-tool, then there are only three options there: Subpixel (for LCD screens) Standard (greyscale) none Without the freetype-freeworld, the first one causes the distortion while the other two options do not.
This message is a reminder that Fedora 27 is nearing its end of life. On 2018-Nov-30 Fedora will stop maintaining and issuing updates for Fedora 27. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '27'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 27 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.
Fedora 27 changed to end-of-life (EOL) status on 2018-11-30. Fedora 27 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.